Transmission device, transmission method, reception device, and reception method

ABSTRACT

The present technology ensures that electrooptical conversion processing for transmission video data obtained using an HDR optoelectrical conversion characteristic is favorably carried out at a receiving side. The transmission video data is obtained by performing high dynamic range optoelectrical conversion on high dynamic range video data. A video stream is obtained by applying encoding processing to this transmission video data. A container in a predetermined format including this video stream is transmitted. Meta information indicating an electrooptical conversion characteristic corresponding to a high dynamic range optoelectrical conversion characteristic is inserted into a parameter set field in the video stream.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.16/827,267, filed Mar. 23, 2020, which is a continuation of U.S.application Ser. No. 15/524,441, filed May 4, 2017, now U.S. Pat. No.10,609,327, issued Mar. 31, 2020, which is a National Stage entry under35 U.S.C. § 371 of PCT/JP2015/085160, filed Dec. 16, 2015, and is basedupon and claims the benefit of priority from prior Japanese PatentApplication No. 2014-267034, filed Dec. 29, 2014, the entire contents ofeach of which are incorporated herein by reference.

TECHNICAL FIELD

The present technology relates to a transmission device, a transmissionmethod, a reception device, and a reception method. More specifically,the present technology relates to a transmission device and so onconfigured to transmit transmission video data obtained by applying highdynamic range optoelectrical conversion to high dynamic range videodata.

BACKGROUND ART

Transmitting transmission video data obtained by applying high dynamicrange optoelectrical conversion to high dynamic range video data hasbeen considered in the past. Hereinafter, the high dynamic range will beabbreviated as “HDR” as appropriate. For example, Non-patent Document 1has mentioned an HDR optoelectrical conversion characteristic (new gammacharacteristic) including a compatibility field with a conventionaloptoelectrical conversion characteristic (gamma characteristic), bytaking the reception by a conventional reception apparatus into account.

CITATION LIST Non-Patent Document

Non-patent Document 1: Tim Borer, “Non-Linear Opto-Electrical TransferFunctions for High Dynamic Range Television”, Research & DevelopmentWhite Paper WHP 283, July 2014

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

An object of the present technology is to ensure that electroopticalconversion processing for transmission video data obtained using an HDRoptoelectrical conversion characteristic is favorably carried out at areceiving side.

Solutions to Problems

A concept of the present technology is a transmission device including:

-   -   an optoelectrical converter that performs high dynamic range        optoelectrical conversion on high dynamic range video data to        obtain transmission video data;    -   an encoding unit that applies encoding processing to the        transmission video data to obtain a video stream;    -   a transmitter that transmits a container in a predetermined        format including the video stream; and    -   an information inserter that inserts meta information indicating        an electrooptical conversion characteristic corresponding to a        characteristic of the high dynamic range optoelectrical        conversion into a parameter set field in the video stream.

According to the present technology, the high dynamic rangeoptoelectrical conversion is performed on the high dynamic range videodata by the optoelectrical converter, whereby the transmission videodata is obtained. The encoding processing is applied to the transmissionvideo data by the encoding unit, whereby the video stream is obtained.The container in the predetermined format including this video stream istransmitted by the transmitter.

The meta information indicating the electrooptical conversioncharacteristic corresponding to the characteristic of the high dynamicrange optoelectrical conversion is inserted into the parameter set fieldin the video stream by the information inserter. For example, theparameter set field may be a field in an SPS NAL unit.

As described above, the present technology is designed to insert themeta information indicating the electrooptical conversion characteristiccorresponding to the characteristic of the high dynamic rangeoptoelectrical conversion into the parameter set field in the videostream. Consequently, electrooptical conversion processing for thetransmission video data obtained using the HDR optoelectrical conversioncharacteristic can be favorably carried out at a receiving side.

In addition, for example, the present technology may be configured insuch a manner that the information inserter further inserts, into alayer of the container, identification information indicating that thevideo stream supports the high dynamic range. This identificationinformation allows the receiving side to easily recognize that the videostream supports the high dynamic range, whereby it is made possible toextract the meta information indicating the electrooptical conversioncharacteristic corresponding to the characteristic of the high dynamicrange optoelectrical conversion from the parameter set field in thevideo stream and perform proper electrooptical conversion on thetransmission video data.

For example, this case may be configured in such a manner thatinformation indicating whether the video stream has displaycompatibility with a normal dynamic range is added to the identificationinformation. Alternatively, for example, this case may be configured insuch a manner that information indicating whether display brightnessadjustment for the video stream is prohibited is added to theidentification information.

Additionally, for example, this case may be configured in such a mannerthat the container is a transport stream, and the information inserterinserts the identification information into a section belonging to oneof a program map table and an event information table. Furthermore, forexample, this case may be configured in such a manner that the containeris an MMT stream, and the information inserter inserts theidentification information into a section belonging to an MMT packagetable.

Meanwhile, for example, the present technology may be configured in sucha manner that the information inserter further inserts the metainformation for display control into a field different from theparameter set field in the video stream. For example, this case may beconfigured in such a manner that the meta information for displaycontrol includes peak brightness information. Alternatively, forexample, this case may be configured in such a manner that the metainformation for display control includes field information indicating afield where the display brightness adjustment is allowed. In this case,it is made possible to properly carry out display control using the metainformation for display control.

Additionally, for example, this case may be configured in such a mannerthat the meta information for display control includes informationindicating whether display brightness adjustment for the video stream isprohibited. With this, adjustment exceeding the intent of a creator canbe suppressed regarding the display brightness, or alternatively, eyefatigue of a viewer can be suppressed.

Meanwhile, another concept of the present technology is a receptiondevice including:

-   -   a receiver that receives a container in a predetermined format        including a video stream obtained by encoding transmission video        data;    -   a decoding unit that applies decoding processing to the video        stream to obtain the transmission video data; and    -   an electrooptical converter that performs electrooptical        conversion on the transmission video data obtained at the        decoding unit to obtain display video data, in which    -   the transmission video data is data obtained by applying high        dynamic range optoelectrical conversion to high dynamic range        data, and    -   meta information indicating an electrooptical conversion        characteristic corresponding to a characteristic of the high        dynamic range optoelectrical conversion is inserted into a        parameter set field in the video stream,    -   the reception device further including an information extractor        that extracts the meta information from the video stream, in        which    -   the electrooptical converter uses the electrooptical conversion        characteristic indicated by the meta information extracted at        the information extractor.

According to the present technology, the container in the predeterminedformat including the video stream obtained by encoding the transmissionvideo data is received by the receiver. The decoding processing isapplied to the video stream by the decoding unit, whereby thetransmission video data is obtained. Subsequently, the electroopticalconversion is performed on the transmission video data by theelectrooptical converter, whereby the display video data is obtained.

The transmission video data is data obtained by applying the highdynamic range optoelectrical conversion to the high dynamic range data.The meta information indicating the electrooptical conversioncharacteristic corresponding to the characteristic of the high dynamicrange optoelectrical conversion is inserted into the parameter set fieldin the video stream. The meta information is extracted from the videostream by the information extractor. In the electrooptical converter,the electrooptical conversion characteristic indicated by this metainformation is used to apply the electrooptical conversion to thetransmission video data. For example, the parameter set field may be afield in an SPS NAL unit.

As described above, the present technology is designed to extract themeta information indicating the electrooptical conversion characteristiccorresponding to the characteristic of the high dynamic rangeoptoelectrical conversion from the parameter set field in the videostream such that the electrooptical conversion characteristic indicatedby this meta information is used to perform the electroopticalconversion on the transmission video data. Consequently, electroopticalconversion processing for the transmission video data obtained using thecharacteristic of the high dynamic range optoelectrical conversion canbe favorably carried out.

In addition, for example, the present technology may be configured insuch a manner that identification information indicating that the videostream supports the high dynamic range is inserted into a layer of thecontainer, and the information extractor extracts the meta informationfrom the parameter set field in the video stream on the basis of theidentification information. In this case, the meta information iscorrectly extracted from the parameter set field in the video stream andaccordingly, it is made possible to perform proper electroopticalconversion on the transmission video data.

Meanwhile, for example, the present technology may be configured in sucha manner that the meta information for display control is included in afield different from the parameter set field in the video stream, and abrightness adjustment unit is further provided, which adjusts displaybrightness of the display video data on the basis of the metainformation for display control. For example, this case may beconfigured in such a manner that the meta information for displaycontrol includes field information indicating a field where the displaybrightness adjustment is allowed, and the brightness adjustment unitadjusts the display brightness of the field where the display brightnessadjustment is allowed. In this case, the display brightness can beproperly adjusted.

Alternatively, for example, this case may be configured in such a mannerthat information indicating whether the display brightness adjustmentfor the video stream is prohibited is inserted into a layer of thecontainer and/or a layer of the video stream, and the brightnessadjustment unit does not adjust the display brightness of the displayvideo data in a case where the information indicating whether thedisplay brightness adjustment for the video stream is prohibitedindicates the prohibition thereof. With this, adjustment exceeding theintent of a creator can be suppressed regarding the display brightness,or alternatively, eye fatigue of a viewer can be suppressed.

Effects of the Invention

According to the present technology, the electrooptical conversionprocessing for the transmission video data obtained using the HDRoptoelectrical conversion characteristic can be favorably carried out atthe receiving side. Note that the effects described in the presentdescription merely serve as examples and not construed to be limited.There may be an additional effect as well.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram illustrating an exemplary configuration of atransmission/reception system serving as an embodiment.

FIG. 2 is a block diagram illustrating an exemplary configuration of atransmission device constituting the transmission/reception system.

FIG. 3 is a diagram for explaining a characteristic of HDRoptoelectrical conversion.

FIGS. 4A and 4B are diagrams for explaining that a reference level“Reference level” and a threshold level “Threshold level” can bedirectly or indirectly specified depending on types of HDRelectrooptical conversion characteristics.

FIG. 5 is a diagram illustrating a top access unit in a GOP in a casewhere an HEVC encoding technique is used.

FIG. 6 is a diagram illustrating an access unit other than the topaccess unit in the GOP in a case where the HEVC encoding technique isused.

FIG. 7 is a diagram illustrating an exemplary structure of a dynamicrange SEI message.

FIG. 8 is a diagram illustrating content of primary information in theexemplary structure of the dynamic range SEI message.

FIG. 9 is a diagram illustrating an exemplary structure of a highdynamic range descriptor.

FIG. 10 is a diagram illustrating content of primary information in theexemplary structure of the high dynamic range descriptor.

FIG. 11 is a diagram illustrating an exemplary configuration of atransport stream.

FIG. 12 is a block diagram illustrating an exemplary configuration of areception device constituting the transmission/reception system.

FIG. 13 is a diagram for explaining a characteristic of the HDRelectrooptical conversion, HDR display mapping processing and so on.

FIG. 14 is a block diagram illustrating another exemplary configurationof the transmission/reception system.

FIG. 15 is a diagram illustrating exemplary structures of a seventh byteand subsequent bytes in a packet of “Vender Specific InfoFrame” sentfrom a set top box to a monitor.

FIG. 16 is a diagram illustrating content of primary information in therespective exemplary structures in the packet of “Vender SpecificInfoFrame”.

FIG. 17 is a diagram illustrating an exemplary configuration of an MMTstream.

MODE FOR CARRYING OUT THE INVENTION

Modes for carrying out the invention (hereinafter, referred to as“embodiments”) will be described below. Note that the description willbe given in the following order.

1. Embodiment

2. Variation

1. EMBODIMENT

[Exemplary Configuration of Transmission/Reception system]

FIG. 1 illustrates an exemplary configuration of atransmission/reception system 10 serving as an embodiment. Thistransmission/reception system 10 is constituted by a transmission device100 and a reception device 200.

The transmission device 100 generates a transport stream TS in MPEG2 asa container and incorporates this transport stream TS into abroadcasting wave or a packet in a network to transmit. This transportstream TS includes a video stream obtained by applying encodingprocessing to a transmission video data obtained by performing HDRoptoelectrical conversion on HDR video data.

Meta information indicating an electrooptical conversion characteristiccorresponding to an HDR optoelectrical conversion characteristic isinserted into a parameter set field in the video stream. In addition,identification information indicating that the video stream supports HDRis inserted into a layer of the container. This identificationinformation includes information indicating whether the video stream hasdisplay compatibility with a normal dynamic range, informationindicating whether display brightness adjustment for the video stream isprohibited and so on. Hereinafter, the normal dynamic range will beabbreviated as “LDR” as appropriate.

Meanwhile, information for display control is inserted into a fielddifferent from the parameter set field in the video stream. This metainformation for display control includes peak brightness information,field information indicating a field where the display brightnessadjustment is allowed, information indicating whether the displaybrightness adjustment for the video stream is prohibited and so on.

The reception device 200 applies decoding processing to the video streamincluded in the received container to obtain the transmission videodata. The reception device 200 performs optoelectrical conversion on thetransmission video data on the basis of a transmission conversioncharacteristic indicated by the meta information inserted into theparameter set field in the video stream, thereby obtaining display videodata. In this case, the reception device 200 extracts the metainformation inserted into the parameter set field in the video stream,on the basis of the identification information inserted into the layerof the container to indicate that the video stream supports the highdynamic range.

The reception device 200 also carries out display mapping processing onthe display video data, namely, adjusts the display brightness thereofon the basis of the information for display control inserted into theparameter set field in the video stream. In a case where informationinserted into the layer of the container and/or a layer of the videostream to indicate whether the display brightness adjustment isprohibited indicates the prohibition thereof, this display brightnessadjustment is not carried out.

[Exemplary Configuration of Transmission Device]

FIG. 2 illustrates an exemplary configuration of the transmission device100. This transmission device 100 has a control unit 101, an HDR camera102, an HDR optoelectrical converter 103, a video encoder 104, a systemencoder 105, and a transmitter 106. The control unit 101 includes acentral processing unit (CPU) in the configuration thereof and controlsactions of respective members in the transmission device 100 on thebasis of a control program.

The HDR camera 102 images an object and outputs high dynamic range (HDR)video data. This HDR video data has a contrast ratio exceeding thebrightness of a white peak of a conventional SDR image, specifically, 0to 100%*N (where N is a numeral larger than one) such as 0 to 1000%. Forexample, a level of 100% here equivalents to a white brightness value of100 cd/m².

A master monitor 103 a is a monitor used to carry out grading on the HDRvideo data obtained at the HDR camera 102. This master monitor 103 a hasa display brightness level supporting the HDR video data or suitable forthe grading of the HDR video data.

The HDR optoelectrical converter 103 applies the HDR optoelectricalconversion characteristic to the HDR video data obtained at the HDRcamera 102 to obtain transmission video data V1. Both of a solid line aand a dashed line b in FIG. 3 represent examples of HDR OETF curvesindicating the HDR optoelectrical conversion characteristics. Meanwhile,a dashed line c in FIG. 3 is an SDR OETF curve indicating an SDRoptoelectrical conversion characteristic. In FIG. 3, a lateral axisrepresents an input brightness level, whereas a longitudinal axisrepresents a transmission code value.

The HDR optoelectrical conversion characteristic can be configured so asto include a compatibility field with the SDR optoelectrical conversioncharacteristic, as in the HDR optoelectrical conversion characteristicsindicated by the aforementioned solid line a and dashed line b in FIG.3. In other words, the curved lines of both of the characteristics matchwith each other until the input brightness level reaches a compatibilitylimit value for both of the characteristics. At a point where the inputbrightness level reaches the compatibility limit value, the transmissioncode value is obtained as a compatibility level SP. According to the HDRoptoelectrical conversion characteristic, at a point where the inputbrightness level reaches peak brightness PL, the transmission code valueis obtained as a peak level MP.

An HDR display reference threshold CL represents an boundary between afield where matching brightness is required and a field where thedependency on the CE monitor is allowed as brightness used for displayon a monitor of a reception apparatus (CE monitor). At a point where theinput brightness level reaches the HDR display reference threshold CL,the transmission code value is obtained as a threshold level CP in, forexample, the HDR OETF curve by the solid line a in FIG. 3. Meanwhile,according to the SDR optoelectrical conversion characteristic, at apoint where the input brightness level reaches SDR characteristicexpression limit brightness SL, the transmission code value is obtainedas the peak level MP. SL here is assigned to 100 cd/m². Note that theHDR display reference threshold CL can be also configured to match thecompatibility limit value and, in this case, the threshold level CP canbe substituted by the compatibility level SP.

Referring back to FIG. 2, the video encoder 104 applies the encodingsuch as MPEG4-AVC or HEVC to the transmission video data V1 to obtainencoded video data. This video encoder 104 also uses a stream formatter(not illustrated) included therein in a latter stage to generate thevideo stream including this encoded video data (video elementarystream).

At this time, the video encoder 104 inserts the meta informationindicating an HDR electrooptical conversion characteristic correspondingto the HDR optoelectrical conversion characteristic into the parameterset field in the video stream. The video encoder 104 according to thisembodiment inserts meta information “Transfer characteristics” into afield for video usability information (VUI) in an SPS NAL unit in anaccess unit (AU).

This meta information “Transfer characteristics” specifies the HDRelectrooptical conversion characteristic. Specifically, theabove-mentioned “Transfer characteristics” represents “New Type” as atype of the HDR electrooptical conversion characteristic. In this case,a reference level “Reference level” and a threshold level “Thresholdlevel” can be directly or indirectly specified. The reference level“Reference level” here is assigned to, for example, 100% equivalent to awhite brightness value of 100 cd/m². Meanwhile, the threshold level“Threshold level” represents an boundary between a field where matchingbrightness is required and a field where the dependency on the CEmonitor is allowed as brightness used for display on the monitor of thereception apparatus (CE monitor).

In the case of the direct specification, “Reference level” and“Threshold level” are assumed to be defined as identification values inthe VUI, as illustrated in FIG. 4(a). This case indicates thatrespective elements are mentioned in semantics rules for the VUI to bereferenced. Note that “Reference level” and “Threshold level” do notnecessarily need to be separately determined but one of the levels canbe determined by setting “Reference level”=“Threshold level”.

In the case of the indirect specification, “Reference level” and“Threshold level” are not assumed to be defined as the identificationvalues in the VUI, as illustrated in FIG. 4(b). In this case, respectiveelements are not mentioned in the semantics rules for the VUI. This caseindicates that

Reference level=Lr(Lx>Lr>Lc)

Threshold level=Lt(Ly>Lt>Lr)

are determined in a standard defining “Transfer characteristics”specified in the VUI as characteristics of “New Type”. Note that“Reference level” and “Threshold level” do not necessarily need to beseparately determined but one of the levels can be determined by setting“Reference level”=“Threshold level”.

Additionally, the video encoder 104 inserts the meta information fordisplay control into a field other than the parameter set field in thevideo stream. The video encoder 104 according to this embodiment insertsa dynamic range SEI message (Dynamic Range SEI message) to be newlydefined into a section of “SEIs” in the access unit (AU).

FIG. 5 illustrates a top access unit in a group of pictures (GOP) in acase where an HEVC encoding technique is used. Meanwhile, FIG. 6illustrates an access unit other than the top access unit in the GOP ina case where the HEVC encoding technique is used. In the case of theHEVC encoding technique, an SEI message group “Prefix SEIs” for decodingis arranged before slices (Slices) in which pixel data is encoded,whereas an SEI message group “Suffix SEIs” for display is arranged afterthe above-mentioned slices (Slices). As illustrated in FIGS. 5 and 6,the dynamic range SEI message may be configured to be arranged as theSEI message group “Suffix_SEIs”.

FIG. 7 illustrates an exemplary structure (Syntax) of the dynamic rangeSEI message. FIG. 8 illustrates content of primary information(Semantics) in the above exemplary structure. An eight-bit field of“transfer characteristics” specifies the HDR electrooptical conversioncharacteristic. Specifically, this field represents “New Type” as a typeof the HDR electrooptical conversion characteristic.

An eight-bit field of “number_of_bits” represents the number of encodedpixel bits. A sixteen-bit field of “minimum_brightness_value” representsa minimum level of the brightness (cd/m²). A sixteen-bit field of“peak_level” represents a relative value (%) at a maximum level. Asixteen-bit field of “peak_level_brightness” represents a maximum levelof the brightness (cd/m²) and corresponds to the peak brightness PL inFIG. 3.

A sixteen-bit field of “compliant_threshold_level” represents athreshold (%) during display level mapping. A sixteen-bit field of“compliant_threshold_level_value” represents the brightness (cd/m²)functioning as the threshold during the display level mapping andcorresponds to the HDR display reference threshold CL in FIG. 3. Notethat threshold information constituted by “Compliant_threshold_level”and “Compliant_threshold_level_value” can be sent as 100% indicatingreference brightness and the reference brightness, respectively. A flagof “mapping_protection_flag” indicates whether display mapping (displaybrightness adjustment) after decoding is prohibited. “1” indicates thatthe display mapping is prohibited. “0” indicates that the displaymapping is not prohibited.

Referring back to FIG. 2, the system encoder 105 generates the transportstream TS including the video stream VS generated at the video encoder104. Subsequently, the transmitter 106 incorporates this transportstream TS into a broadcasting wave or a packet in a network to transmitto the reception device 200.

At this time, the system encoder 105 inserts, into the layer of thetransport stream (container), the identification information indicatingthat the video stream supports the high dynamic range. The systemencoder 105 according to this embodiment inserts a high dynamic rangedescriptor (High Dynamic Range descriptor) into a section belonging to aprogram map table (PMT) or a section belonging to an event informationtable (EIT).

FIG. 9 illustrates an exemplary structure (Syntax) of the high dynamicrange descriptor. FIG. 10 illustrates content of primary information(Semantics) in the above exemplary structure. An eight-bit field of“descriptor_tag” represents a descriptor type and here indicates thatthe high dynamic range descriptor is used. An eight-bit field of“descriptor_length” represents a length (size) of the descriptor andindicates the number of subsequent bytes as the length of thedescriptor.

A flag of “HDR_flag” indicates whether a service stream (video stream)is of a type supporting the HDR. “1” indicates that the video streamsupports the HDR and additionally indicates whether the VUI has the HDRcharacteristic, or the VUI is conventional but the SEI provides HDRinformation, or the VUI has the HDR characteristic and also the SEI hasthe HDR information. “0” indicates that the video stream does notsupport the HDR.

A flag of “SDR_compatible_flag” indicates whether the service stream(video stream) has the display compatibility with the SDR in a casewhere the service stream (video stream) supports the HDR. “1” indicatesthat the service stream (video stream) has the display compatibilitywith the SDR. “0” indicates that the service stream (video stream) doesnot have the display compatibility with the SDR. A flag of“mapping_protection_flag” indicates whether the display mapping (displaybrightness adjustment) is prohibited in the service stream (videostream). “1” indicates that the display mapping is prohibited. “0”indicates that the display mapping is not prohibited.

An action of the transmission device 100 illustrated in FIG. 2 will bebriefly described. The HDR video data obtained through imaging by theHDR camera 102 is supplied to the HDR optoelectrical converter 103. TheHDR video data obtained at the HDR camera 102 is subjected to thegrading using the master monitor 103 a. In this HDR optoelectricalconverter 103, the HDR optoelectrical conversion characteristic (HDROETF curve) is applied to this HDR video data while the optoelectricalconversion is performed such that the transmission video data V1 isobtained. This transmission video data V1 is supplied to the videoencoder 104.

In the video encoder 104, the encoding such as MPEG4-AVC or HEVC isapplied to the transmission video data V1 such that the encoded videodata is obtained. In addition, in this video encoder 104, the videostream including this encoded video data is generated by the streamformatter included therein in a latter stage.

At this time, in the video encoder 104, the meta information indicatingthe HDR electrooptical conversion characteristic corresponding to theHDR optoelectrical conversion characteristic is inserted into the layerof the video stream. Specifically, in the video encoder 104, the metainformation “Transfer characteristics” is inserted into a field for thevideo usability information (VUI) in the SPS NAL unit in the access unit(AU).

Additionally, in the video encoder 104, the meta information for displaycontrol is inserted into the layer of the video stream. Specifically, inthe video encoder 104, the high dynamic range SEI message to be newlydefined is inserted into a section of “SEIs” in the access unit (AU).

The video stream VS generated at the video encoder 104 is supplied tothe system encoder 105. In this system encoder 105, the transport streamTS in MPEG2 including the video stream is generated. This transportstream TS is incorporated into the broadcasting wave or a packet in anetwork by the transmitter 106 to be transmitted to the reception device200.

At this time, in the system encoder 105, the identification informationindicating that the video stream supports the high dynamic range isinserted into the layer of the transport stream (container).Specifically, in the system encoder 105, the high dynamic rangedescriptor (High Dynamic Range descriptor) is inserted into a sectionbelonging to the program map table (PMT) or a section belonging to theevent information table (EIT).

[Configuration of Transport Stream TS]

FIG. 11 illustrates an exemplary configuration of the transport streamTS. According to this exemplary configuration, there is a PES packet“video PES1” for the video stream identified by PID1. The metainformation “Transfer characteristics” specifying the HDR electroopticalconversion characteristic is inserted into a field for the VUI in theSPS in the access unit. Meanwhile, the dynamic range SEI message inwhich the peak level “Peak level”, the threshold level “Thresholdlevel”, a mapping protection flag “mapping protection flag” and so onare stated is inserted into the access unit.

Additionally, the program map table (PMT) is included in the transportstream TS as program specific information (PSI). The PSI is informationmentioning which program is the one to which each of the elementarystreams included in the transport stream belongs. The PMT has a programloop stating information relating to the whole program.

The PMT has an elementary stream loop having information relating toeach of the elementary streams. According to this exemplaryconfiguration, there is a video elementary stream loop (Video ES loop)corresponding to the video stream. Information such as a stream type anda packet identifier (PID) is arranged in the video elementary streamloop (Video ES loop) so as to correspond to the video stream and at thesame time, the descriptor stating information relating to this videostream is also arranged therein.

The value of “Stream_type” for this video stream is set to, for example,a value indicating an HEVC video stream, whereas the PID information isconfigured so as to indicate PID1 given to a PES packet “video PES” inthe video stream. The high dynamic range descriptor in which an HDR flag“HDR_flag”, an SDR compatible flag “SDR_compatible_flag”, the mappingprotection flag “mapping_protection_flag” and so on are stated isinserted as one of the descriptors.

Additionally, the event information table (EIT) serving as serviceinformation (SI) managing each of events (video programs) is included inthe transport stream TS. Inserting the high dynamic range descriptorinto a section belonging to this EIT is also acceptable.

[Exemplary Configuration of Reception Device]

FIG. 12 illustrates an exemplary configuration of the reception device200. This reception device 200 has a control unit 201, a receiver 202, asystem decoder 203, a video decoder 204, an HDR electrooptical converter205, an HDR display mapping unit 206, and a CE monitor 207. The controlunit 201 includes a central processing unit (CPU) in the configurationthereof and controls actions of respective members in the receptiondevice 200 on the basis of a control program.

The receiver 202 receives the transport stream TS sent from thetransmission device 100 by being incorporated into the broadcasting waveor a packet in a network. The system decoder 203 extracts the videostream (elementary stream) VS from this transport stream TS. The systemdecoder 203 also extracts various items of information inserted into thelayer of the container (transport stream) to send to the control unit201.

In the embodiment, this extracted information includes the informationin the high dynamic range descriptor (refer to FIG. 9) as well. Thecontrol unit 201 recognizes that the video stream supports the HDR,while also recognizing that the SEI (dynamic range SEI) should bereferenced during the HDR display, since the “HDR flag” in the highdynamic range descriptor is assigned to “1”.

The video decoder 204 carries out decoding processing on the videostream VS extracted at the system decoder 203 to output the transmissionvideo data V1. The video decoder 204 also extracts the parameter set andthe SEI message inserted into each of the access units constituting thevideo stream VS to send to the control unit 201.

According to the embodiment, as described above, the control unit 201recognizes that the video stream supports the HDR, while alsorecognizing that the SEI should be referenced during the HDR display.Accordingly, the meta information “Transfer characteristics” specifyingthe HDR electrooptical conversion characteristic, which is inserted intoa field for the VUI in the SPS NAL unit, as well as the dynamic rangeSEI message (refer to FIG. 7) are correctly extracted.

The control unit 201 sets the HDR electrooptical converter 205 with theHDR electrooptical conversion characteristic specified by the metainformation “Transfer characteristics”, namely, the HDR electroopticalconversion characteristic corresponding to the HDR optoelectricalconversion characteristic used at a transmitting side. The HDRelectrooptical converter 205 applies the set HDR electroopticalconversion characteristic to the transmission video data V1 output fromthe video decoder 204 to obtain the display video data for displaying anHDR image.

A solid line a in FIG. 13 represents an HDR EOTF curve (Type A)indicating the HDR electrooptical conversion characteristic. This HDREOTF curve (Type A) corresponds to the HDR OETF curve indicated by thesolid line a in FIG. 3. Meanwhile, a dashed line b in FIG. 13 representsan HDR EOTF curve (Type B) indicating another HDR electroopticalconversion characteristic. This HDR EOTF curve (Type B) corresponds tothe HDR OETF curve indicated by the dashed line b in FIG. 3. Inaddition, a dashed line c in FIG. 13 represents an SDR EOTF curve (TypeC) corresponding to the SDR OETF curve indicated by the dashed line c inFIG. 3.

According to the HDR electrooptical conversion characteristic, at apoint where the transmission code value reaches the peak level MP, thedisplay brightness level is obtained as PL. Meanwhile, at a point wherethe transmission code value reaches the threshold level CP, an outputbrightness level is obtained as the HDR display reference threshold CL.Additionally, in FIG. 13, in the case of the HDR EOTF curve (Type A),brightness mapping such as one indicated by a two-dot chain line a′ isperformed at a display side until reaching the display brightness levelEP as long as the threshold level CP and the HDR display referencethreshold CL are provided and mapping protection is not enabled.Compared to this, in the case of the HDR EOTF curve (Type B), brightnessmapping such as one indicated by a one-dot chain line b′ is performed ata display side until reaching the display brightness level EP as long asthe compatibility level SP and the reference level defined therefor aredetected and the mapping protection is not enabled. Note that, asdescribed earlier, the threshold CL represents an boundary between afield where matching brightness is required and a field where thedependency on the CE monitor is allowed as brightness used for displayon the monitor of the reception apparatus (CE monitor).

Brightness information on PL and CL is included in the dynamic range SEImessage inserted into the layer of the video stream as the metainformation for display control (refer to FIG. 7). The HDR displaymapping unit 206 adjusts the display brightness of the display videodata obtained at the HDR electrooptical converter 205 on the basis ofthe meta information for display control. Specifically, in a case wherethe CE monitor 207 has maximum brightness display capability equal to EPhigher than PL, it is also made possible for the HDR display mappingunit 206 to carry out, as one approach for a display function, thedisplay mapping processing, namely, the display brightness adjustmentprocessing such that a maximum display brightness level is shifted to EPfor levels exceeding the brightness at CL from among the outputbrightness levels of the HDR electrooptical converter 205. The two-dotchain line a′ in FIG. 13 represents an example of the display brightnessadjustment processing in this case.

In addition, the HDR display mapping unit 206 does not carry out thedisplay brightness adjustment processing on the basis of the control ofthe control unit 201 in a case where “mapping protection flag” in thehigh dynamic range descriptor and the dynamic range SEI message isassigned to “1” to indicate that the display mapping is prohibited. Withthis, adjustment exceeding the intent of a creator is suppressedregarding the display brightness, or alternatively, eye fatigue of aviewer is suppressed.

An action of the reception device 200 illustrated in FIG. 12 will bebriefly described. In the receiver 202, the transport stream TS sentfrom the transmission device 100 by being incorporated into thebroadcasting wave or a packet in a network is received. This transportstream TS is supplied to the system decoder 203. In the system decoder203, the video stream VS is extracted from this transport stream TS.

Additionally, in the system decoder 203, various items of informationinserted into the layer of the container are extracted to be sent to thecontrol unit 201. This extracted information includes the information inthe high dynamic range descriptor (refer to FIG. 9) as well. In thecontrol unit 201, a fact that the video stream supports the HDR isrecognized on the basis of the “HDR flag” in the high dynamic rangedescriptor being assigned to “1”, while a fact that the SEI should bereferenced during the HDR display is also recognized similarly.

The video stream VS extracted at the system decoder 203 is supplied tothe video decoder 204. In the video decoder 204, the decoding processingis applied to the video stream VS extracted at the system decoder 203,whereby the transmission video data V1 is obtained.

In addition, in the video decoder 204, the parameter set and the SEImessage inserted into each of the access units constituting the videostream VS are extracted to be sent to the control unit 201. As describedabove, in the control unit 201, a fact that the video stream supportsthe HDR is recognized, while a fact that the SEI should be referencedduring the HDR display is also recognized. Accordingly, the metainformation “Transfer characteristics” specifying the HDR electroopticalconversion characteristic, which is inserted into a field for the VUI inthe SPS NAL unit, as well as the dynamic range SEI message (refer toFIG. 7) are extracted.

Under the control of the control unit 201, the HDR electroopticalconverter 205 is set with the HDR electrooptical conversioncharacteristic specified by the meta information “Transfercharacteristics”, namely, the HDR electrooptical conversioncharacteristic corresponding to the HDR optoelectrical conversioncharacteristic used at the transmitting side. In the HDR electroopticalconverter 205, the set HDR electrooptical conversion characteristic isapplied to the transmission video data V1 output from the video decoder204, whereby the display video data for displaying the HDR image isobtained.

The display video data obtained at the HDR electrooptical converter 205is supplied to the HDR display mapping unit 206. In the HDR displaymapping unit 206, the display brightness of the display video data isadjusted on the basis of the meta information for display control.Specifically, in a case where the CE monitor 207 has the maximumbrightness display capability equal to EP higher than PL, the displaymapping processing, namely, brightness conversion processing is carriedout in the HDR display mapping unit 206 such that the maximum displaybrightness level is shifted to EP for levels exceeding the brightness atCL from among the output brightness levels of the HDR electroopticalconverter 205 (refer to the two-dot chain line a′ in FIG. 13).Alternatively, the display mapping processing, namely, the brightnessconversion processing is carried out for levels exceeding the referencebrightness level such that the maximum display brightness level isshifted to EP (refer to the one-dot chain line b′ in FIG. 13).

In addition, the display brightness adjustment processing is not carriedout in the HDR display mapping unit 206 in a case where “mappingprotection flag” in the high dynamic range descriptor and the dynamicrange SEI message is assigned to “1” to indicate that the displaymapping is prohibited. Accordingly, the display video data obtained atthe HDR electrooptical converter 205 is output as it is.

The output video data from the display mapping unit 206 is supplied tothe CE monitor 207. The HDR image is displayed on this CE monitor 207.

As described thus far, in the transmission/reception system 10illustrated in FIG. 1, the meta information “Transfer characteristics”specifying the electrooptical conversion characteristic corresponding tothe high dynamic range optoelectrical conversion characteristic isinserted into a field for the VUI in the SPS NAL unit in the videostream. Consequently, the electrooptical conversion processing for thetransmission video data obtained using the HDR optoelectrical conversioncharacteristic can be favorably carried out at the receiving side whenthe HDR electrooptical conversion characteristic specified by the metainformation “Transfer characteristics” is used therefor.

Additionally, in the transmission/reception system 10 illustrated inFIG. 1, the high dynamic range descriptor (High Dynamic Rangedescriptor) is inserted into the layer of the container (transportstream). This descriptor includes “HDR_flag” indicating whether theservice stream (video stream) is of a type supporting the HDR. Thisallows the receiving side to easily recognize that the video streamsupports the high dynamic range, whereby it is made possible tocorrectly extract the meta information “Transfer characteristics”indicating the electrooptical conversion characteristic corresponding tothe high dynamic range optoelectrical conversion characteristic from theparameter set field in the video stream and perform properelectrooptical conversion on the transmission video data.

Meanwhile, in the transmission/reception system 10 illustrated in FIG.1, the dynamic range SEI message (Dynamic Range SEI message) is insertedinto the layer of the video stream. This SEI message includes the metainformation for display control. Consequently, the display brightnesscontrol can be properly carried out at the receiving side using thismeta information for display control. In this case, the meta informationfor display control includes the field information indicating a fieldwhere the display brightness adjustment is allowed such that thebrightness conversion in accordance with, for example, the displaybrightness capability of the CE monitor 207 is performed only for thefield where the brightness conversion is allowed. As a consequence, itis made possible to favorably reproduce a brightness atmosphere intendedby the creator.

Furthermore, in the transmission/reception system 10 illustrated in FIG.1, the high dynamic range descriptor and the dynamic range SEI messageinclude the flag of “mapping_protection flag” indicating whether thedisplay mapping (display brightness adjustment) is prohibited in theservice stream (video stream). Consequently, adjustment exceeding theintent of the creator can be suppressed regarding the displaybrightness, or alternatively, eye fatigue of a viewer can be suppressed.

2. VARIATION

Note that the above embodiment has indicated an example where, in thereception device 200, the HDR electrooptical converter 205 carries outthe electrooptical conversion processing and additionally, the HDRdisplay mapping unit 206 carries out the brightness conversionprocessing in accordance with the maximum brightness display capabilityof the CE monitor 207. However, by reflecting a brightness conversioncharacteristic in the electrooptical conversion characteristic (EOTF) inadvance, the electrooptical conversion processing and the brightnessconversion processing can be simultaneously carried out by the HDRelectrooptical converter 205 alone.

In addition, the above embodiment has indicated thetransmission/reception system 10 constituted by the transmission device100 and the reception device 200. However, the configuration of thetransmission/reception system to which the present technology can beapplied is not limited thereto. For example, as in atransmission/reception system 10A illustrated in FIG. 14, a section ofthe reception device 200 may be substituted by a configuration includinga set top box (STB) 200A and a monitor 200B interconnected through adigital interface such as a High-Definition Multimedia Interface (HDMI).Note that “HDMI” is a registered trademark.

In this case, for example, the video decoder 204 and its precedingmembers are included in the set top box 200A and the electroopticalconverter 205 and its subsequent members are included in the monitor200B. The set top box 200A uses, for example, a packet of “VenderSpecific InfoFrame” to send the meta information indicating the HDRoptoelectrical conversion characteristic, the meta information fordisplay control and so on to the monitor 200B.

FIG. 15 illustrates exemplary structures of a seventh byte andsubsequent bytes in the packet of “Vender Specific InfoFrame” sent fromthe set top box 200A to the monitor 200B. Meanwhile, FIG. 16 illustratescontent of primary information in the respective exemplary structures.

Three-bit information of “Display_control_type” is arranged from aseventh bit to a fifth bit in the seventh byte. This three-bitinformation represents a classification of a display type. “001”indicates SD display control, whereas “010” indicates HDR displaycontrol. “010” is employed here.

The flag of “mapping_protection_flag” is arranged in a fourth bit in theseventh byte. This flag indicates whether the display mapping (displaybrightness adjustment) after decoding is prohibited. “1” indicates thatthe display mapping is prohibited. “0” indicates that the displaymapping is not prohibited. Four-bit information of“Display_control_metadata_length” is arranged from a third bit to azeroth bit in the seventh byte. This four-bit information represents thesize of “Display_control_metadata” arranged at the following place, innumber of bytes. “12” is employed here.

Eight-bit information of “Transfer characteristics” is arranged in aneighth byte. This eight-bit information specifies the HDR electroopticalconversion characteristic. The electrooptical conversion characteristicfor display is detected through this information. “0×10” is employedhere. Eight-bit information of “Number of bits” is arranged in an 8+1stbyte. This eight-bit information represents the number of encoded pixelbits.

Sixteen-bit information of “Minimum brightness value” is arranged in an8+2nd byte and an 8+3rd byte. This sixteen-bit information represents aminimum level of the brightness (cd/m²). Sixteen-bit information of“Peak Level” is arranged in an 8+4th byte and an 8+5th byte. Thissixteen-bit information represents a relative value (%) at a maximumlevel.

Sixteen-bit information of “Peak Level Brightness” is arranged in an8+6th byte and an 8+7th byte. This sixteen-bit information represents amaximum level of the brightness (cd/m²). Sixteen-bit information of“Compliant_threshold_level” is arranged in an 8+8th byte and an 8+9thbyte. This sixteen-bit information represents a threshold (%) during thedisplay level mapping. Sixteen-bit information of“Compliant_threshold_level_value” is arranged in an 8+10th byte and an8+11th byte. This sixteen-bit information represents the brightness(cd/m²) functioning as the threshold during the display level mapping.Note that threshold information constituted by“Compliant_threshold_level” and “Compliant_threshold_level_value” can besent as 100% indicating reference brightness and the referencebrightness, respectively. In addition, the above-mentioned informationtransmission from the set top box 200A to the monitor 200B is notlimited to a case using the packet of “Vender Specific InfoFrame” and itis apparent that defining another packet of InfoFrame enables thetransmission similarly.

Furthermore, the above embodiment has indicated an example where thetransport stream (MPEG-2 TS) serves as the container. However, thetransport according to the present technology is not limited to TS and,also in the case of another packet such as ISOBMFF or MMT, the videolayers can be implemented using the same method.

FIG. 17 illustrates an MMT structure. An MMT stream has an MMT packetfor each of assets such as video and audio. According to the illustratedexample, the MMT packet identified by ID1 is provided as the videoasset. The meta information “Transfer characteristics” specifying theHDR electrooptical conversion characteristic is inserted into a fieldfor the VUI in the SPS in the access unit. Meanwhile, the dynamic rangeSEI message in which the peak level “Peak level”, the threshold level“Threshold level”, a mapping protection flag “mapping protection flag”and so on are stated is inserted into the access unit.

In addition, the MMT stream has a message packet such as a packet access(PA) message packet. The PA message packet includes tables such as an MPtable (MMT Package Table). The MP table includes information on each ofthe assets. Here, the high dynamic range descriptor in which the HDRflag “HDR flag”, the SDR compatible flag “SDR compatible flag”, themapping protection flag “mapping protection flag” and so on are statedis inserted in association with the video asset.

Note that the present technology can be also configured as describedbelow.

(1) A transmission device including:

-   -   an optoelectrical converter that performs high dynamic range        optoelectrical conversion on high dynamic range video data to        obtain transmission video data;    -   an encoding unit that applies encoding processing to the        transmission video data to obtain a video stream;    -   a transmitter that transmits a container in a predetermined        format including the video stream; and    -   an information inserter that inserts meta information indicating        an electrooptical conversion characteristic corresponding to a        characteristic of the high dynamic range optoelectrical        conversion into a parameter set field in the video stream.

(2) The transmission device according to the aforementioned (1), inwhich

-   -   the parameter set field is a field in an SPS NAL unit.

(3) The transmission device according to the aforementioned (1) or (2),in which

-   -   the information inserter further inserts, into a layer of the        container, identification information indicating that the video        stream supports the high dynamic range.

(4) The transmission device according to the aforementioned (3), inwhich

-   -   information indicating whether the video stream has display        compatibility with a normal dynamic range is added to the        identification information.

(5) The transmission device according to the aforementioned (3) or (4),in which

-   -   information indicating whether display brightness adjustment for        the video stream is prohibited is added to the identification        information.

(6) The transmission device according to any one of the aforementioned(3) to (5), in which

-   -   the container is a transport stream, and    -   the information inserter inserts the identification information        into a section belonging to one of a program map table and an        event information table.

(7) The transmission device according to any one of the aforementioned(3) to (5), in which

-   -   the container is an MMT stream, and    -   the information inserter inserts the identification information        into a section belonging to an MMT package table.

(8) The transmission device according to any one of the aforementioned(1) to (7), in which

-   -   the information inserter further inserts the meta information        for display control into a field different from the parameter        set field in the video stream.

(9) The transmission device according to the aforementioned (8), inwhich

-   -   the meta information for display control includes peak        brightness information.

(10) The transmission device according to the aforementioned (8) or (9),in which

-   -   the meta information for display control includes field        information indicating a field where the display brightness        adjustment is allowed.

(11) The transmission device according to any one of the aforementioned(8) to (10), in which

-   -   the meta information for display control includes information        indicating whether display brightness adjustment for the video        stream is prohibited.

(12) The transmission device according to any one of the aforementioned(8) to (11), in which

-   -   the field different from the parameter set field is a field in        an SEI NAL unit.

(13) A transmission method including:

-   -   an optoelectrical conversion step of performing high dynamic        range optoelectrical conversion on high dynamic range video data        to obtain transmission video data;    -   an encoding step of applying encoding processing to the        transmission video data to obtain a video stream;    -   a transmission step of transmitting a container in a        predetermined format including the video stream through a        transmitter; and    -   an information insertion step of inserting meta information        indicating an electrooptical conversion characteristic        corresponding to a characteristic of the high dynamic range        optoelectrical conversion into a parameter set field in the        video stream.

(14) A reception device including:

-   -   a receiver that receives a container in a predetermined format        including a video stream obtained by encoding transmission video        data;    -   a decoding unit that applies decoding processing to the video        stream to obtain the transmission video data; and    -   an electrooptical converter that performs electrooptical        conversion on the transmission video data obtained at the        decoding unit to obtain display video data, in which    -   the transmission video data is data obtained by applying high        dynamic range optoelectrical conversion to high dynamic range        data, and    -   meta information indicating an electrooptical conversion        characteristic corresponding to a characteristic of the high        dynamic range optoelectrical conversion is inserted into a        parameter set field in the video stream,    -   the reception device further including an information extractor        that extracts the meta information from the video stream, in        which    -   the electrooptical converter uses the electrooptical conversion        characteristic indicated by the meta information extracted at        the information extractor.

(15) The reception device according to the aforementioned (14), in which

-   -   the parameter set field is a field in an SPS NAL unit.

(16) The reception device according to the aforementioned (14) or (15),in which

-   -   identification information indicating that the video stream        supports the high dynamic range is inserted into a layer of the        container, and    -   the information extractor extracts the meta information from the        parameter set field in the video stream on the basis of the        identification information.

(17) The reception device according to any one of the aforementioned(14) to (16), in which

-   -   the meta information for display control is included in a field        different from the parameter set field in the video stream,    -   the reception device further including a brightness adjustment        unit that adjusts display brightness of the display video data        on the basis of the meta information for display control.

(18) The reception device according to the aforementioned (17), in which

-   -   the meta information for display control includes field        information indicating a field where the display brightness        adjustment is allowed, and    -   the brightness adjustment unit adjusts the display brightness of        the field where the display brightness adjustment is allowed.

(19) The reception device according to the aforementioned (17) or (18),in which

-   -   information indicating whether the display brightness adjustment        for the video stream is prohibited is inserted into a layer of        the container and/or a layer of the video stream, and    -   the brightness adjustment unit does not adjust the display        brightness of the display video data in a case where the        information indicating whether the display brightness adjustment        for the video stream is prohibited indicates the prohibition        thereof.

(20) A reception method including:

-   -   a reception step of receiving, through a receiver, a container        in a predetermined format including a video stream obtained by        encoding transmission video data;    -   a decoding step of applying decoding processing to the video        stream to obtain the transmission video data; and    -   an electrooptical conversion step of performing electrooptical        conversion on the transmission video data obtained through the        decoding step to obtain display video data, in which    -   the transmission video data is data obtained by applying high        dynamic range optoelectrical conversion to high dynamic range        data,    -   meta information indicating an electrooptical conversion        characteristic corresponding to a characteristic of the high        dynamic range optoelectrical conversion is inserted into a        parameter set field in the video stream, and    -   the electrooptical conversion characteristic indicated by the        meta information is used during the electrooptical conversion        step.

The principal characteristic of the present technology is to insert themeta information specifying the electrooptical conversion characteristiccorresponding to the high dynamic range optoelectrical conversioncharacteristic into the SPS NAL unit in the video stream, therebyensuring that the electrooptical conversion processing for thetransmission video data obtained using high dynamic range optoelectricalconversion characteristic is favorably carried out at the receiving side(refer to FIG. 11).

REFERENCE SIGNS LIST

10, 10A Transmission/reception system100 Transmission device101 Control unit102 HDR camera103 HDR optoelectrical converter103 a Master monitor104 Video encoder105 System encoder

106 Transmitter

200 Reception device

200A Set top box 200B Monitor

201 Control unit

202 Receiver

203 System decoder204 Video decoder205 HDR electrooptical converter206 HDR display mapping unit207 CE monitor

1. A transmission device comprising: an optoelectrical converter configured to perform high dynamic range optoelectrical conversion on high dynamic range video data to obtain transmission video data; and processing circuitry configured to: apply encoding processing to the transmission video data to obtain a video stream; instruct transmission of a container in a predetermined format including the video stream; and insert meta information indicating an electro-optical conversion characteristic corresponding to a characteristic of the high dynamic range optoelectrical conversion into a parameter set field in the video stream, wherein the processing circuitry is further continued to insert meta information for display control into a field different from the parameter set field in the video stream, and wherein the meta information for display control includes one or more of: (a) peak brightness information, (b) field information indicating a field where display brightness adjustment is allowed, and (c) information indicating whether the display brightness adjustment for the video stream is prohibited.
 2. The transmission device according to claim 1, wherein the parameter set field is a field in a Sequence Parameter Set Network Abstraction Layer (SPS NAL) unit.
 3. The transmission device according to claim 1, wherein the processing circuitry further inserts, into a layer of the container, identification information indicating that the video stream supports the high dynamic range.
 4. The transmission device according to claim 3, wherein information indicating whether the video stream has display compatibility with a normal dynamic range is added to the identification information.
 5. The transmission device according to claim 3, wherein information indicating whether display brightness adjustment for the video stream is prohibited is added to the identification information.
 6. The transmission device according to claim 3, wherein the container is a transport stream, and the processing circuitry inserts the identification information into a section belonging to one of a program map table and an event information table.
 7. The transmission device according to claim 3, wherein the container is a MPEG Media Transport (MMT) stream, and the processing circuitry inserts the identification information into a section belonging to an MMT package table.
 8. A transmission method comprising: performing high dynamic range optoelectrical conversion on high dynamic range video data to obtain transmission video data; applying encoding processing to the transmission video data to obtain a video stream; transmitting a container in a predetermined format including the video stream through a transmitter; and inserting meta information indicating an electro-optical conversion characteristic corresponding to a characteristic of the high dynamic range optoelectrical conversion into a parameter set field in the video stream, wherein the inserting further comprises inserting meta information for display control into a field different from the parameter set field in the video stream, and wherein the meta information for display control includes one or more of: (a) peak brightness information, (b) field information indicating a field where display brightness adjustment is allowed, and (c) information indicating whether the display brightness adjustment for the video stream is prohibited.
 9. A reception device comprising: a receiver that receives a container in a predetermined format including a video stream obtained by encoding transmission video data; and processing circuitry configured to apply decoding processing to the video stream to obtain the transmission video data, and perform electro-optical conversion on the transmission video data obtained at the decoding to obtain display video data, wherein the transmission video data is data obtained by applying high dynamic range optoelectrical conversion to high dynamic range data and inserting meta information indicating an electro-optical conversion characteristic corresponding to a characteristic of the high dynamic range optoelectrical conversion is inserted into a parameter set field in the video stream, and meta information for display control included in a field different from the parameter set field in the video stream, wherein the meta information for display control includes one or more of: (a) peak brightness information, (b) field information indicating a field where display brightness adjustment is allowed, and (c) information indicating whether the display brightness adjustment for the video stream is prohibited the reception device, wherein the processing circuitry is further configured to extract the meta information from the video stream, wherein the electro-optical conversion uses the electro-optical conversion characteristic indicated by the extracted meta information, and wherein the processing circuitry is further configured to adjust display brightness of the display video data on the basis of the meta information for display control.
 10. The reception device according to claim 9, wherein identification information indicating that the video stream supports the high dynamic range is inserted into a layer of the container, and the processing circuitry is further configured to extract the meta information from the parameter set field in the video stream on the basis of the identification information.
 11. The reception device according to claim 9, wherein information indicating whether the display brightness adjustment for the video stream is prohibited is inserted into a layer of the container and/or a layer of the video stream, and the display brightness of the display video data is not adjusted in a case where the information indicating whether the display brightness adjustment for the video stream is prohibited indicates prohibition thereof.
 12. A reception method comprising: receiving, through a receiver, a container in a predetermined format including a video stream obtained by encoding transmission video data; applying decoding processing to the video stream to obtain the transmission video data; and performing electro-optical conversion on the transmission video data obtained through the decoding to obtain display video data, wherein the transmission video data is data obtained by applying high dynamic range optoelectrical conversion to high dynamic range data and inserting meta information indicating an electro-optical conversion characteristic corresponding to a characteristic of the high dynamic range optoelectrical conversion into a parameter set field in the video stream, wherein the electro-optical conversion characteristic indicated by the meta information is used during the electro-optical conversion, wherein meta information for display control is included in a field different from the parameter set field in the video stream, and wherein the meta information for display control includes one or more of: (a) peak brightness information, (b) field information indicating a field where display brightness adjustment is allowed, and (c) information indicating whether the display brightness adjustment for the video stream is prohibited, and wherein the method further includes adjusting display brightness of the display video data on the basis of the meta information for display control. 